Check-valve



H. s. `1. DEINEN.

CHECK VALVE.

APPucATlfoN msn nc.2o. 1911.

Patented July 29, 1919.

5. l We M. s@ Y N .MQ .Q

k@ N\ l ///w f l Q k s CHECK-VALVE.

Application filed December 20, 1917.

To all whom t may Concern.'

Be it known that I, HANS Gr. J. DEINERT, a citizen of the United States, residing at Big Spring, in the county of Howard and State of Texas, have invented new and useful Improvements in Check-Valves, of which. the following is a specification.

This invention relates to check valves which are interposed between the injector and the boiler of locomotives, and its object is to provide a valve of this kind which will secure a better priming action and a greater forcing power of the injector, and which can be easily disconnected from the boiler for repairs.

With the object stated in view, the invention consists in a novel combination and arrangement of parts to be hereinafter described and claimed, and in order that the same may be better understood, reference is had to the accompanying drawing forming a part of this specification.

In the drawing, y

Figure l is a longitudinal section of the device;

n Fig. 2 is a plan view of the check valve proper, and

Fig. 3 is a plan view of a valve guide.

Referring specifically to the drawing, 5 denotes an elongated 'check valve casing having at one end a seat 6 for the valve 7 The passage leading from the inlet end of the casing to the valve seat is reamed in the form of 'a nozzle, it being made tapering in the direction of the valve seat, whereby the velocity of the water flowing through the passage is materially increased, which secures a better priming action and a greater forcing power of the ejector, and will greatly prolong the life of the nozzle in the ejector. The liquid passed forward through the agency of the injector, and headed for the boiler by way of the check valve, loses a portion of its velocity through pipe-friction, pipe-bends, etc. of the boiler feed conduit, and in order to compensate for this loss of velocity and to restore the liquid to the original or initial velocity attained at the injector nozzle, the check-valve nozzle 5 has been provided. This nozzle, while somewhat diminishing the volume of the boiler feed water, increases its speed, whereby the life of the injector nozzle is pro longed because the strain of service upon the Specification of Letters Patent.

Patented July 29,1919.

Serial No. 208,130.

latter is diminished. `The fact that the nipple or pipe 13 restores the original velocity is of no importance and does not detract from the usefulness of the device, for the reason that once the water has passed the check valve 7 it has no further influence on the injector and cannot react thereon.

The inlet end of the casing 5 is connected by a coupling nut 8 to a nipple 9 by which latter the connection with the injector (not shown) is made.

ATo the outlet end of the check valve casing 5 is detachably connected the casing 10 of a shut-off valve 11. This casing has a side outlet 12 which is suitably connected to the boiler (not shown).

The connection between the casings 5 and 10 is made by a nipple 13 and a coupling nut 14., the latter being screwed on the outlet end of the casing 5 and engaging the usual shoulder or ange on the nipple, and the nipple, in turn, being connected to the casing 10 by being screwed into the inlet end thereof.

Between the shouldered end of the nipple 13 and the adjacent end of the casing 5 is held a guide for the valve 7, this guide being a ring 15 between which and a central hub 16 radial arms 17 extend. The stem 18 of the valve 7 extends slidably through the hub portion of the guide member. rlhe ring portion 15 is shouldered on one side as shown at 19 to seat on the end of the casing 5, and on its other side it has a bevel seat 20 engaged by the beveled end of the nipple 13.

By connecting the two valve casings, as hereinbefore described, the parts can be easily disconnected from the boiler for ree pairs. The entire structure is also simple and composed of few parts and devoid of parts liable to get out of order.

I claim:

1. A boiler check comprising an elongated casing provided with a Huid passage which is tapered and having means at its larger end for connection to an injector, a valve seat at the smaller end of the passage, a check valve engageable with the seat, a second valve casing connected to the first-mentioned casing into lwhich the latter discharges past the che-ck valve, a shut-off valve in the second-mentioned casing, and means for connecting` said casing to a boiler to be supplied iby the injector.

2. A valve `comprising a casing having a shut-off valve7 a guide for the check valve Valve seat at its outlet end and apassage held between the end ofthe rst-mentonec'l leading to said seat from the inlet end of the casing and the adjacent end of the nipple, 10

Y casing, a cheek valve engagealble with the and a coupling member connecting the,` nip- 5 seat, a nipple opposite `the outlet end of the ple and the first-mentioned easing.

first-mentioned casing, a second valve eas- In testimony whereof I aX my signature. ing connected t0 the nipple and having a HANS GUSTAV JOACHIM DEINERT.

Copies of this patent may be obtained for ive cents each, by addressing' the "Commissioner of Patents. Washington, D. C. 

